// -*- mode:c++; tab-width:2; indent-tabs-mode:nil; c-basic-offset:2 -*-
#ifndef __FINDER_PATTERN_FINDER_H__
#define __FINDER_PATTERN_FINDER_H__

/*
 *  FinderPatternFinder.h
 *  zxing
 *
 *  Copyright 2010 ZXing authors All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include <zxing/qrcode/detector/FinderPattern.h>
#include <zxing/qrcode/detector/FinderPatternInfo.h>
#include <zxing/common/Counted.h>
#include <zxing/common/BitMatrix.h>
#include <zxing/ResultPointCallback.h>
#include <vector>

namespace zxing
{

  class DecodeHints;

  namespace qrcode
  {

    class FinderPatternFinder
    {
    private:
      static int CENTER_QUORUM;

    protected:
      static int MIN_SKIP;
      static int MAX_MODULES;

      Ref<BitMatrix> image_;
      std::vector<Ref<FinderPattern>> possibleCenters_;
      bool hasSkipped_;

      Ref<ResultPointCallback> callback_;

      /** stateCount must be int[5] */
      static float centerFromEnd(int *stateCount, int end);
      static bool foundPatternCross(int *stateCount);

      float crossCheckVertical(size_t startI, size_t centerJ, int maxCount, int originalStateCountTotal);
      float crossCheckHorizontal(size_t startJ, size_t centerI, int maxCount, int originalStateCountTotal);

      /** stateCount must be int[5] */
      bool handlePossibleCenter(int *stateCount, size_t i, size_t j);
      int findRowSkip();
      bool haveMultiplyConfirmedCenters();
      std::vector<Ref<FinderPattern>> selectBestPatterns();
      static std::vector<Ref<FinderPattern>> orderBestPatterns(std::vector<Ref<FinderPattern>> patterns);

      Ref<BitMatrix> getImage();
      std::vector<Ref<FinderPattern>> &getPossibleCenters();

    public:
      static float distance(Ref<ResultPoint> p1, Ref<ResultPoint> p2);
      FinderPatternFinder(Ref<BitMatrix> image, Ref<ResultPointCallback> const &);
      Ref<FinderPatternInfo> find(DecodeHints const &hints);
    };
  } // namespace qrcode
} // namespace zxing

#endif // __FINDER_PATTERN_FINDER_H__
